{
    "classifications": [
        {
            "column": "Company Name",
            "role": "identifier",
            "confidence": 0.7,
            "reason": "Identifies each company/row; names are near-unique labels used to key records"
        },
        {
            "column": "Founded",
            "role": "dimension",
            "confidence": 0.95,
            "reason": "Year of founding; used for grouping/slicing by year"
        },
        {
            "column": "Location",
            "role": "dimension",
            "confidence": 0.95,
            "reason": "Geographic city category used for grouping"
        },
        {
            "column": "Sector",
            "role": "dimension",
            "confidence": 0.97,
            "reason": "Industry category used for grouping"
        },
        {
            "column": "What it does",
            "role": "attribute",
            "confidence": 0.95,
            "reason": "Free-form company description text"
        },
        {
            "column": "Founders",
            "role": "attribute",
            "confidence": 0.93,
            "reason": "Free-form list of person names, displayed only"
        },
        {
            "column": "Investor",
            "role": "attribute",
            "confidence": 0.6,
            "reason": "Free-text investor names, often multiple combined; descriptive rather than a clean grouping axis"
        },
        {
            "column": "Amount",
            "role": "measure",
            "confidence": 0.9,
            "reason": "Funding amount in dollars (stored as text); summed/averaged"
        },
        {
            "column": "Stage",
            "role": "dimension",
            "confidence": 0.96,
            "reason": "Funding stage category with low cardinality"
        }
    ]
}